                                      (:genome ind))))]
     (make-individual :genome new-genome
                      :history (:history ind)
+                     :age (inc (:age ind))
                      :ancestors (if maintain-ancestors
                                   (cons (:genome ind) (:ancestors ind))
                                   (:ancestors ind)))))

          new-genome (mapv silent-mutator (:genome ind))]
      (make-individual :genome new-genome
                       :history (:history ind)
                       :age (inc (:age ind))
                       :ancestors (if maintain-ancestors
                                    (cons (:genome ind) (:ancestors ind))
                                    (:ancestors ind))))))
